It's a 175W, ITT/American-Electric NEMA head circa 1980's.
BTW, 60 is the frequency in Hertz (Hz). If the current was 60 Amps at 120 Volts, it would be a 7.2kW (7,200 watt) lumenaire! Current is more likley to be around 3.3 Amps, which is average for this kind of fixture that has a normal power factor (NPF) ballast .